Attachment plug receptacle



Feb. 5, 1935. H. E. sLADE ET Al. 1,989,890

ATTACHMENT PLUGA RECEPTACLE Filed Dec. 12, 195o 4 sheets-sheet 1 i 'iL-53&1 @zdf/'Q50 la; W l

HARoLoIE. S LA De INVENToRs ff n l I; 55 A V2? 1 75 BY 2% ZZ jy Z9 5ATTORNEYS Feb. 5, 1935. H E SLADE TAL I 1,989,890

ATTACHMENT PLUG RECEPTACLE Filed Dec. 12, 195o 4 sheets-sheet 2 Hmmm, E:SLADE INVENToRs' l B? n Q ATIFORNEYS Feb. 5, 1935. H. E. sLADE E'r Al.1,989,890

ATTACHMENT PLUG RECEPTACLE Filed Dec. v12, 1950 4 Sheets-Sheet '3 ya,zf/ i ATTORN EYS Feb. 51935. H. E. sLADE Er Al.. ,989,890

ATTACHMENT PLUG RECEPTAGLE Filed Dec. l2, 1950 4 Sheets-Sheet 4 HAROLDE- '5MM JHN G-e H R WG INVENTORS ATTORNEYS v Patented Feb. 5, 1935 je1einer turing: Company; Newarla. N1. L,

of; New; Jersey.`l

ai.. corporation Appleman" December 1.2, rden; sei-fai un;501,' 1'12lv11. elaimsev (on. 17e-33092.

This. invention relates to attachment plug re:- ceptacles and moreparticularlyto receptacles off thellsh, W133i i Heretofora, receptacleslotr the. character set.

. forth havev been.Y constructed along variousflines,

all of which howeverpossess someinherentdisfadvantages, vsuch astha-.usa ot aseparate member. for holdingthe contact* bars in. placeg.etc.

i vA-nobfiecti ot. the present inventionI is.V to; prov vide. an.improvedy attachment receptacle of, the flushi type. simple andinexpensive to manufacture` and mechanically.v efficient in. structurel.

According to the present invention, the faults. heretoorej founds in-yreceptacles of the type-here in-v described areovercome by forming.Pthebody structure of the' receptacle ina such manner that integral;parts thereofservefgto holdthe contact members irhplace vvthinthecontact chambers. Without-requiringadditionalrelements'. Iur.ther more,'the receptacle ricade:v up-in. accordance .with thef present invention.providesl renementsg suclr asi simple.' indications as to polarityofthe. con.` tact.. andr simplicity of` s tructure.;

Other` fea-tures,V objects and advantages ofrthe invention. will'.become-- apparent by referenceto the vfollowing detail description takenim connect-f; tion with y'the accompanying' drawings, wherein: Fig-urefL is. ajplan view of; arr attachment'rea ceptaelei of .the iiushvtype.Figure 2 is asideelevation; partlyin section edthedeviceillustratedinliligiirefl;y

Figure 3; is\. a. bottomf plan view with' parts.' broken away tov showt/he cor-istruci'iolr` of: the I defviceshown: iii/ Figuresl and? 2;

Figfure; 4 is a; `sectiornV taken substantiallyoni the lines; 4--4l ef-Figure 1;- l Figure. 'is a section taken: substantially-"on the lines 5-5of Figure. l1; y

Y Figure 621s asection*taken'substantiallyonithe; lines. 6,6- ofFigure-1;V f Figure 'Tis 'ai-perspective vievvoff thef'comd ponent.partey of; the device before. assembly; l f Figurey is-fafview similarta- Figure- 2: of a modified form, of the.invenltion.y f

Figurefl is,y a View similanft deviceshown inFigure 8;

Figure 10Y is a. section 3.4 offthe.

, takeasubstantial1r9nthe lines- 10---10r of Figure 81 andE sl-'lwvnx inenglarge@ 36316.? y Figure 1l is; a; perspective. View of jthepartsconstituting. the contact members usedfinmodiecation-oif,Figures-g8; .to 10 inclusive;-.

Figure l 12 isa View y similar.' to:l Figures 2f andi 8.: of. a@ st-ill;further modification of; the irri-igen.;v

Ofl'; .1: I

.Fig-,ure I3; is aviewsimilar, tol Figures y 31. and. 9L of the.devceshownrin. Eguref 12;.. Figure; l'efisa section.takenrsubstanti'ally. on the lines. 14e-1A f Figure L2; I Y

"gure 1`5 is a perspective vView"o f'ofne of.' the 5 Contact membersemployed. thef modification shown, in. Figures, 1121and11l4. inclusive.

Referring now, tothe drawingsand; particularly to .Figures ,1Q tol'inclusiva. 10 indicates adupleic receptaoleincorporating, therein twosets of' con-1 tacts arranged' centaet. chanfuerssubstantiallly,parallel respectA to.. each,v other and, in.straight.alie.I1x`ne111'1s-v The..receptzacle.1-0'r asshownconstitutes.- a pairloffbays-Lll and. 1'21v ccn'inect'edfy by arweb..13. of,` fthe. same.` matelzal as? the. bays.. lil',` and 12.- an'd..fomed'gintegrallytherewith. Asi shovvlnr inFigure.- 24, theweb '133 i's`depressed be# l`ow, the. top.. surfaces` ofthe'. bays ll and'. l2,While.

these', bays themselveslaref provided with de,-v

ber

Q16: and ,.'1.'7. ar'e. providedl in` thebau 1:1.'Whi1esi'mila'rchambers I8'l and. 19l. are, provided' ire-the. bau 12'.. Eacl'i` of..the bays; 16. tol 19'. inclusiveI is provided, Witha; slot 2`0`terminating'. at a fshouldef. 211,'. W slhtspermitthe. introducttion. ofcontactmefmbers' 221 into the respectiva chambersf'rom the. underside Yof the, receptacle.; Asshownclearl'yin Figur' 7 .aspace 23. is pro.-Vi'dedl. between.. the inner walls of" each. pair: of. .the receptacle.chamber'sf-fr-the purpose'. of..re.- duci'ng the! amount. of materaLrequired the.

construction off.' the.' device. Furthermore. the. Walls of. the'fweb113.1 are pizcaidedy With'fslots 221' shovvnd'n staggered relation. for.a purpose tofbe, describedihereinafjer.. f f'Extefndig,ffrnyliflef.sidesY Ofwtlxe. Weby 1`3 are'. oppositely,.disposed sloul'dfe'rs5l 25 vhavingV chamferedl` suraces. 2B..'Einbeddedj inthe underside oflth'e. Web,- 13'. are. a pair. of.' pii1s127lf The body of'web. 13'. is hollowed". outiorfthe reception. orfa. perpendicular bari`2`8laving. horizontal flanges 29.. andSOL' Each'ofthe. flangesv 29andr 3'0' hasv a tl'ireaded.' opening ire'reinf.Ly lff Extending beyond; the. mi: or 'one weils. olf.' the. cdrltt'jchambersfare alpair obosses' 3.1 prcvded with;per1'i`ngs-ljtherei-nllA AsJshoWm irL"Figure. 4;; theginerf-edge. ot'each'. bess.v 3-1 terminatestsub-- st arii-Liallyt midwayfoi there taclechambers, .asY 5 0; indi'c ateci,y atp-32,- threb viding shoulders..

o dedlwitlia recess Qn'oftl'ieshouldersi 33, the purpose. of.. whichJWilllbedescribedl liereinfV aime-51.

ThefcQewtiaceebefe-ZZ @Eames from flat 55' pieces of material,die-stamped into the form shown in the drawings. The extremities of thestrips constituting the contact members are bent into the shape shown inFigure 7, wherein forked prongs 34 are produced. The material of themembers 22 is some good electrical conducting material possessing aslight amount of resiliency. Each member 22 has a portion thereof ofsuch size as to permit drilling and tapping therein for the reception ofcontact screws 35. The remaining parts of the receptacle consist -of astrip 36 of some good insulating material, provided with a centralopening 37, and a pair of openings 38 of such size as toreceive the pins27; together with a pair of supporting members 40 which are utilized forfastening the iinished receptacle within its box. Each supporting member40 is in the shape of a Z bar with a tongue 41 bent downwardly from thetop of the bar. An opening 42 is provided in( each bar in position tocorrespond to the openings in bosses 31 when the device is assembledand, furthermore, each bar 40 is provided with an opening 43 ofsubstantial length, whereby the finished receptacle can be adjusted inits box.

As will be noted from the drawings, the respective bays, the webconnectingthe same, the shoulders 25 and the bosses 31 are molded ofsome suitable insulated material as a unitary structure. After thisstructure has been molded the various parts are` assembled in thefollowing manner: The two contact members 22'are introduced into theproper contact chambers `by slight` ly flexing the bar 22 and sliding itin such a manner that the prongs 34 enter the proper chambers with thedivergent parts thereof pointing toward the bottom of the chamber.Since, as before pointed out, the material of` these contact mem-V berspossesses `some resiliency, it is possible lto force the members 22 intoproper place, sliding them over the shoulders 25, which are chamfered asshown lat 26 to facilitate this movement. As soon as the members 22 havereached their proper position, relative to the contact chambersthe partof the member 22 in contact with the surface of each shoulder 25 lwillclear this shoulder and assume its original position (aflat condition)lying Yflush against the side of web 13; In this position the member 22is restrained fromout-` ward movement by the edge of shoulder 25. Asshown in Figure 7, one of the contact members may beprovided with'a nub33 adaptedV to fit within the recess 33.4 -v The purpose of these cooperating parts will be described later.'

As soon` as thev two Vcontact strips 22 have properly beenpositioned'with their. prongs withiny the contact chambers, the lstrip36 o f insulating material may be placed on the bottom of the moldedarticle with the pins 27 engaging the openings 38. This plate 36 issecured in place simultaneously with the securing Iin place of the bar28 positioned in the opening in the web 1 3 by means of a screw 50,which passes through opening 37 in plate 36, opening 37 inmweb 13, intothreaded engagement withthe hole flange 29. When this screw has beentightened `the, member 28 -is firmly held within the web 13 Vand alsothe' insulating plate 36 is held againstthe bottom ofthe moldedarticle,effectively 'closing the bottoms of thev Contacty chambers to preventoutside articles c'oming into contact Withthe-prongspossibilityof'shorting the'contacts. l

The iinal operationof iassembly consistsof attaching the supportingmembers"40to' the 34 therewithin, in this manner" removing` the moldedform, such members being positioned to cause matching of openings 42 and42 and engagement of tongues 41 with shoulders 32. With these members 40properly positioned they may be locked in place by means of screws 55which are of well-known construction, being capable of being-driven intounthreaded openings within the molded insulating material. By utilizingspecial screws of this type, it is possible to eliminate the v*step ofthreading the walls of openings 42'. By

providing the slots 24 it is possible to assemble the parts with thecontact screws 35 in place since the ends thereof may travel down theseslots during such assemble. y

Withk the device assembled in the manner previously described,` it willbe noted that the invention yprovides a receptacle in which the contactmembers are held in place with the prongs thereof in thecontact chambersby means of portions of the molded article itself and without the use ofoutside members. The strip 36 is provided solely for minimizing thepossibility of shorting the various contacts by extraneous objects. Theuse of the separatemembers 40 permit a substantial reduction in thequantity of material used without losing any strength, rigidity, etc.

' For purposes of convenience the top of openings leading into contactchambers 17 and 19 are shown as being longer than the openings leadinginto chambers 16 and 18. The utility of this construction resides in'vthe fact that the contact members maybe connected with an electricalcircuit in well-known manner and polarity of the contacts may beindicated by the difference in length of chamber opening. For example,it may beV said that the longer openings indicate the negative terminalsofthe circuit. To aid in this distinction the matched nub 33 and recess33 are provided, so that the party connecting the receptacle may connectthe proper contact with the proper terminal. The customary cover plate56 may be used to fit around the bays 11 and 12, such plate being'secured to the receptacle by means of screw 57 passing through theplate 56 into threaded engagement with the opening in flange 30.

. `Referring now to Figures 8 to 11 inclusive, the device illustratedtherein is constructed for the greater part in substantially the samemanner as that shown in Figures 1V to 7- inclusive. For this reasoncorresponding parts have been designated by corresponding referencecharacters. As before,fthe device consists of twobays 11 and 12connected by a web '13, the respective bays having contact chambers 16,17, 18 and 19, the chambers 17 and 19 being longer than chambers 16 and18, to indicate polarity, as before explained. The web 13 is hollowedout as before for the reception of thebar 28 having flanges 29 and 30.Instead of chamfered shoulders 25, the present molded article isprovided with oppositely disposed enlargements 60,' each enlargementhaving an upstanding rib 61 spaced from the outer walls of the web 13.These enlargements plus rib 61 serve in conjunction with other membersto hold contact strips70 in place with their prongs 71 positioned withinthe respective contact chambers. As shown clearly in Figure 11, contactmember 70 is for the most part a at bar, the ends of which areformedinto the prongs 71 situated in offset relation to--the main partof the bar. An enlargement 72 is vprovided so that the member 70 can beapertured at- 73 for the passage of al bolt 74. Inf conjunction with themember 70, use is made of an auxiliary retaining member 75, shaped mmeassembiy'of'maniements-the!respective 2 bams 75'; are: first positionediasshowlnl in' Figure: mi with, the flange: 7B lyingvin. the. space.between.

. nib'f 6d; andi wall; of: web; 113; with; portion 78 rest ingr onitopiot'rib. @1i ands withzthe Yrfa-t part Walnush againshthee'outen Wallofextensionl 60;. the aper# turev 8D being-y positi'oned' inlregisterwith slot. 244 in the web Wali.. With theserftwohparts in place' the:`contactY member' 'mi beev inserted with the! pnorrgsathereloi ini the!propen chambers; byfslightlwexingsthflat expanse':of them'ernber;lsothatditri'deszoven'theedgeeot the? angeU-.T As soon asthecmemben'malhasabeenmolvedi upwardly tbwardr thea tops of: theebwys-z an amount.sulfrcient the lowenzerlgez thereof: ton clean the: lan'ge y 7.7;resilience of: thea contachfmemben causesiitto; straighten .outirrtonormal flatpform,.whiclt position-.it isarestraneoiironrmovementbym'eansl oithezilange 7H.. When sol properly.;A positioned', thebolt7.4i maar.r be passedathrough :aperture: 73 into: engagemenirwith;apertura 8.0 tightened tu: the? desired. extent, subsequent. to which.this saurez bnlti '7%- sei-vest as". a. terminal to'. which. an:eleutrioal conductor can; befconnected.. The ret-y mainden of; theassembly ofrthe, pants is similar to; that hereztofonex described and.will b'e'- readily apparenifbyfinspection,ofthelgureseinvthe drawings;nelative'. t'heret.r It"should',ber noted how:-

-t ever:imthismudilcatiomthatzftheprongs '11i tting;

vizitliinl the` chambers 151 and-.f 193 are;.larger than' thex prongs-2itting: inn the;` chambersvlnand. 18'.

, This structureis merely-'for the. purpose of aidcipal differenceresideszirrthe construction ofthe contact: member L with:v itszintegralprongs. and the manneninwhiclnit is :heidiimpiacel by an integral parteof: theV molded.; anticle; of insulating; material; Asxshowni. inlligure.V ;,the contact member'rconsists-of arflatabartzhavingj prongs 81ati each en'd thereof? in;. somewha-t offset. position; The

1 barr80gisf1 alsoiprovidedfWitlil atflat tongue. 82I nor` ma/Hyr lying;im the:r same;l plane: therewithy and threadedly aperturectI as:` atS..

asten-ding bzetweemthe walls of th" Contact chambers' 16 andfl'Sfnespectively and 17 and 19y respectively, are a pair of flat ribs 85 ofa height corresponding to the width'of bar 80 and oomposed of the samematerial as that making up the molded article. These ribs 85 are'spaced,however, from the outer walls of the web 13 by a slot of a Widthslightly greater than the thickness of bar 80. Each rib 85 is providedat its mid part with an enlargement 86 apertured for the reception ofscrew 87.

In the assembly of vthis structure the contact members composed of barand prongs 81 are introduced into the molded article so that the prongs81 extend into the proper contact chambers, while the tongue 82 passesbetween rib 85 and Wall. of web 13. As soon asthe contact mem' bers havebeen positioned with the prongsextending into the chambers to themaximum amount, the two contact members may be locked against retractionby bendingthe respective.

tonguesrsm outwemdltcoaen tha topf edge'. of: ribsi 85;. J Whom theetongues 82 register: with theienlargenrentaligtsmthatrwhen: thef screw:87; is tightenedr the. apentunes: 835.. thev ends. ot

thescrewsiwill extendiintoi this: apertures; inlenelargements 86,therebyvr al terminals to; whiohroner. endl oft anaelectricaskconductor' cani be connectedx. The: and: thek re.- mainingipants-armassembled as described in con,- nention thezfisrstt mnoxslinsetti-on.

thezpiieeeingtfnrmaof the-'.inventiongthe: contact; chambers; and 19aarefshowrr as?A being aislighttbitllomenthamchambersttdandi1'8,.while\the, prongs-:ttingi within thea turnier chambers. ara. likeavi'serlatgenthan; rthose fitting: within' the latter: chambersl Thsastruotutegasbefore explained; isffontaiding imdetepmining: the: polarity thelvariouscontae'tss., i

From the foregoing, it will be seen` that.: the presentinyentionzimeachl of the forms; illustrated andn desoribedz amv-idea,amanrangemen-t; wherein thezcontact:memberseusedinsa.duplexs'attachmentreceptaclerane: held placefagaifnst retraction solely, by .coe-actionwdthl a. member. vformed 'as a component part of theemdlded: articleforming the'l skeleton.y of: the'device.. so constructing thereceptacleitf. isspossble, to eliminate a number otunneces-sary parts,thereby-reducingr the. cost of. manufacturefami-` likeswisefeliminating,l the pos.\ sibilityot. the contact..memberslbeooming;inadvertently retracted on withdnaamfrom their proper.position;` n

It willbez-1readilyI apparentth-at the invention is capable.; of@modification beyond that set forth hereinbefore-,- invievn of@ which: itis. to be understood, that theyinventi-on.is not to'be limited by n theincorporated..embodiments butl is to be lim'- Wey clair-ni.

itedllonly by the scopefofathefollowing claims:

.1., Anattachment.- plug. receptacle comprising. a. molded body of.insulating material; recessed to forma plurality of"pairfs. of. contactchambers separated' by a web having -a' liollowetl'` out por.- tion; thewalls of said chambers being recessed for the' introduction of''congtact members", into. the chambers', apairof'spabedi'conrrerated'plates'with-` in-^the-`hollowed out; portion'off the web; each plate-beingfthreadedlyfapertured af' sheet' ofinsulating.. materialien.- th'el bachi of' saidv body and secured?.thereto: by.A ai member" threaded into? .the aperture off onefotsaidyplatesl andi members forme'dias integralparts*fot'saidfbody/foraiding in retaining sii/id Gontaot,f. membersl mthin .the 'chambers.

v f 2o. Angattachment.,plugzreceptacle: comprisinga molded body ofainsulating material; `recessed to form a Aplurality of pairs of contactchambers separated by a web having a hollowed out portion; the Wallsofsaid chambers being recessed for the introduction of contact membersinto the chambers, a pair of spaced connected plates within the hollowedout portion of the web, each plate being threadedly apertured, a sheetof insulating material on the back of said body and secured thereto by amember threaded into the aperture of one of said plates, members formedas integral parts of said body for aiding in retaining said contactmembers within the chambers, and separate supporting members secured tothe ends of said body.

3. An attachment plug receptacle comprising a molded body of insulatingmaterial recessed to form a plurality of pairs of 'contact chambersseparated by Aa web, the walls of said chambers being recessed for theintroduction of contact CFI to.p

prongs on the ends of substantially flat bars from the under side ofsaid body, shoulders on said web integral therewith and extendingoutwardly from the web inthe space between the pairs of contact chambersfor contact with said bars to retain said prongs in said chambers.

4. An attachment'. plug receptacle comprising a molded bodyofinsulating'material recessed to form a plurality of pairs of contactAchambers separated by a web, substantially yflat bars having contactprongs on the ends-thereof, said contact prongs being inserted in saidchambers, said chambers being open at the underside of said body for theintroductionv of said'contactprongs, and external shoulders on said vwebintegral therewith, said bars resting against said web behind saidshoulders with longitudinal edges of the bars engaging the shoulders toretain said prongs in said chambers.

5. An attachment plug receptacle comprising a molded bodyof insulatingmaterial formed into end portions separated by a web, each end portionbeing provided with contact chambers, substantially fiat Contact barshaving prongs at the ends thereof inserted in contact chambers in eachend portion, and external retaining members intermediate the ends of thebodyon each side thereof formed integrally therewith, said retainingmembers being'engaged by parts of said contact bars when the prongsare'in lthe contact chambers to retain said prongs in said chambers.

6. An attachment plug receptacle comprising a molded body of insulatingmaterial formed into end portions-separated by a web, each end portionbeing provided with contact' chambers, substantially iat contact barshaving" prongs at the ends thereof inserted in contact Chambers in eachend portion, and Aexternalretaining shoulders on each side of the bodyformed integrallyvwith said web, said retaining shoulders being engagedby parts of said Contact bars when the prongs are in the contactchambers to `retain said prongs in said chambers. l y

'7. An attachment plug receptacle-'comprising a a molded body ofinsulatingfmaterial formed into end portions separated by a web, eachend portion being provided with Contact chambers, substantially flatcontact vbars having prongs at the ends thereof inserted in contactchambers in each end portion, external retaining shoulders on each sideof the body formed integrally with said web, each retaining vshoulderbeing provided with a rib spaced from the outer Wall of the web, andmembers secured to each contact barand having hook portionsfitting intothe spaces between the ribs and the outer Walls of the web to retainthev prongs in the chambers.

y 8. An attachment plug receptacle Ycomprising a molded body ofinsulating materialformed into end portions separated by a web, each endportion being provided with contact chambers, contact barshavingmembersat the ends thereof inserted in contactchambers in each endportion, retaining ribs intermediate the ends of the body on each sidethereof, and having parts thereof spaced from said web, said. bars beingpositioned in the spaces between said ribs and said web and beingprovided with parts bent oversaid ribsto retain said contacts in :saidchambers.

9. An attachment plug receptacle comprising a molded body of insulatingmaterial formed into end portions separated by a web, eachendv portionbeing provided with ycontact chambers having slottedwalls-'substantially flat contact bars having prongs at the ends'thereofinserted in contact chambers' in eachend portion through said slots, andexternal retaining members intermediate the ends of the body on eachside thereof formed integrally therewith, said retaining members beingengaged by parts of said contact bars when the. prongs are in theContact chambers to retain'said prongs in said chambers.

10. An attachment plug receptacle comprising a molded body of insulatingmaterial formed into end portions separated'by a web, each end portionbeing provided with contact chambers having slotted Walls, contact barshaving prongs at the ends thereof insertedin contact chambers in eachend portion throughsaid slots, retaining shoulders on each side of `thebody formed integrally with saidweb, each retaining'shoulder beingprovided with a rib spaced from the outer wall of the web, and-memberssecured toA each contact bar and having hookportions fitting into thespaces between the ribs and the outer Walls of the web to retain theprongsinthe chambers.

V11. An `attachment plug receptaclel comprising a molded body ofinsulating material formed into end portions separated by a web, eachendportion being provided vwith contact chambers having slotted' Walls,lcontact bars having members at the ends thereof inserted'in contactchambers in each end portion through said slots, retaining ribsintermediate the ends of the body on each side thereof, and having partsthereof spaced from said web, said bars beingA positioned in the spacesbetween said ribs and said web and being provided with parts bent oversaid' ribs to retain said contacts in said chambers.

HAROLD E.l SLADE. JOHN GEHRING.

